Adjustable Resistors

Adjustable resistors, also known as potentiometers, allow a degree of control over the resistance within a circuit. This gives them an advantage over other types of fixed resistor, depending on your needs.
They are composed of a fixed resistive element, and a slider that is able to pass along the element. This is what changes the resistance of the circuit, and it is usually controlled externally.

What are adjustable resistors used for?
Adjustable resistors are most commonly used for volume control in TV and radio. They can also be used as part of a light dimmer, to indirectly affect the level of light.

Types of adjustable resistor
Adjustable resistors largely vary based on material:

  • Wirewound adjustable resistors use a coil of resistance wire, and offer the highest performance.
  • Cermet adjustable resistors are composed of ceramic and metal. They can withstand high temperatures, and are often used in trimmer resistors.
  • Carbon composition adjustable resistors are some of the most common types used, as they are a good all-purpose resistor.
  • Conductive plastic adjustable resistors use conductive plastic ink, and have a low noise output.

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Description Price Resistance Tolerance Power Rating Temperature Coefficient Termination Style Package/Case Technology Mounting Style Case Style Series Dimensions Diameter Length Maximum Operating Temperature
RS庫存編號 144-5507
製造零件編號D50K50RE
TWD593.00
單位
50 Ω ±10% 50W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 14.3 (Dia.) x 101.6mm 14.3mm 101.6mm +350°C
RS庫存編號 144-5506
製造零件編號D25K300E
TWD541.00
單位
300 Ω ±10% 25W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 14.3 (Dia.) x 50.8mm 14.3mm 50.8mm +350°C
RS庫存編號 144-5497
製造零件編號C300K10RE
TWD819.00
單位
10 Ω ±10% 300W ±400ppm/°C Solder Tubular Wire Wound - - 280 28.58 (Dia.) x 215.9mm - - +400°C
RS庫存編號 144-5504
製造零件編號D100K2R0E
TWD1,025.00
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2 Ω ±10% 100W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 19.1 (Dia.) x 165.1mm 19.1mm 165.1mm +350°C
RS庫存編號 144-5503
製造零件編號D100K25RE
TWD861.00
單位
25 Ω ±10% 100W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 19.1 (Dia.) x 165.1mm 19.1mm 165.1mm +350°C
RS庫存編號 136-3281
製造零件編號D50K4R0E
TWD710.00
單位
4 Ω ±10% 50W ±260ppm/°C Radial - Wire Wound Bolt On Vitreous Enamel 210 14.3 (Dia.) x 101.6mm 14.3mm 101.6mm +350°C
RS庫存編號 144-5505
製造零件編號D25K20RE
TWD541.00
單位
20 Ω ±10% 25W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 14.3 (Dia.) x 50.8mm 14.3mm 50.8mm +350°C